Glen, there are many portable flange surfacing machines around that do onsite work and wont cost much. Other than that you will have to find someone with a large horizontal borer and take it to their shop. IF you want to do it yourself use a bench grinder with cup wheel mounted on an angle plate which is mounted between nuts on studs on a round plate and get a good quality “Lazy suzy” bearing between two steel discs. Bottom disc should have nuts welded in 4 places 90 degrees so you can screw jacking bolts against the inside of the ring or conning tower depending on dimensions. IF you like the idea then we can do a sketch. Grinder will only do about 0.1mm per rev. Depends on where you are, resources etc. Always remember there are always minimum of 3 ways you should consider to solve any problem. Hugh From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Glen Brown Hi All I need Idea's to get my ct ring surface to mate with my hatch ring as it has warped by + - 2mm in the welding process. Thanks Glen
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